假设给您个机会换CD机。请问您选那个？

[sgyyz]

作者: hugoo

随便挑了一个，测出来是这样：
我水平差，也看不出好坏

This one looks like a real hi-res.
I'm not at home now. Can you try the one I upsampled from 16/44.1 (from a bunch of upsampled files on my USB drive). You should see an mirrored frequency diagram at the top end. Or may be not ...

[hugoo]

sgyyz，你upsampled的来了，一看就有问题

[hugoo]

这个是在hdtracks买的24/192的，看起来很奇怪，应该是有问题的：

[lighting]

作者: hugoo

这个是在hdtracks买的24/192的，看起来很奇怪，应该是有问题的：

没问题啊，别坏了心情！

这软件什么名字？

[hugoo]

作者: lighting

没问题啊，别坏了心情！

这软件什么名字？

对，无所谓了，听起来不错就行了。
是这个：
http://audacity.sourceforge.net/

[hugoo]

这个也是在hdtracks 下的，不过就是普通16/44.1，听起来也很不错的音质，贴上来参考一下：

[lighting]

作者: hugoo

对，无所谓了，听起来不错就行了。
是这个：
http://audacity.sourceforge.net/

这软件很好玩，你说的Jazz.at.the.Pawnshop 音质很好，很通透，

我就测了一下其中的一首“Everything Happens to Me”，

这源盘是什么？ 什么时候的录音？怎么会这么好？？

你看读到了96k了！

[sgyyz]

作者: hugoo

sgyyz，你upsampled的来了，一看就有问题

Interesting. What is the track name?
Believe I have Esperanza Spalding in both native 16/44.1 (100% CD ripped) and upsampling version from 16/44.1 to 24/96. If you don't mind, can you pick one from both and compare the frequency diagrams?

Suspect the upsampling software must have done something interesting ...

edit: looks like the one you attached is DK's Quiet Night. Yes I downloaded the flac from soemwhere and upsampled it. The flac source may possibly be faked into 16/44.1, or it simply doesn't reach the higher ferquency range. Having said that, I have two 24/96 tracks from HDTracks, DK's Quiet Night. I did not purchase the full album for this one. Will compare them when I get home.

[hugoo]

作者: sgyyz

Interesting. What is the track name?
Believe I have Esperanza Spalding in both native 16/44.1 (100% CD ripped) and upsampling version from 16/44.1 to ...

对，是DK的quiet night
好了，第一个是16/44.1，后面一个是upsample后的，同一首歌， Spalding的“little fly”。

[hugoo]

作者: lighting

这软件很好玩，你说的Jazz.at.the.Pawnshop 音质很好，很通透，

我就测了一下其中的一首“Everything Happens to Me”，

这源盘是什么？ 什么时候的录音？怎么会这么好？？

你看读到了96k了！
http://www.chinasmile.ne...

70年代的录音，应该是模拟母带出来的。
看了下介绍，是1976.12.6，在Stockholm Sweden录的，那时候我还刚上幼儿园小班，四人帮才刚被打倒。
30多年，卖了500，000多个copy，现在还在每年卖3000到4000张。

[sgyyz]

作者: hugoo

对，是DK的quiet night
好了，第一个是16/44.1，后面一个是upsample后的。

I can only conclude that details can't be created using upsampling process. That's why both diagrams look almost the same.

[hugoo]

作者: sgyyz

I can only conclude that details can't be created using upsampling process. That's why both diagrams look almost the same.

就是这样的啦，其实就是在两个取样点间在加几个，可加进去的值是什么？就全靠猜了

[sgyyz]

I do software upsampling because I have a mix of real 24/96 tracks (mostly from HD Tracks) and a lot of 16/44.1 tracks. Since iTunes in Windows does not do automatic sampling rate switching (it doesn't have full exclusive access, meaning it has to pass through Windows own mixer, eg. Quick Time (WASAPI) > Windows 7 sound mixer).

So by having 16/44.1 tracks upsampled to 26/96, I can stick Windows mixer to one setting (24/96) and not having to change it manually every time iTunes is gonna play 24/96.

I guess I can say bye-bye to software upsampling, stick to Windows mixer at 24/96 and let Windows do on-the-fly upsampling, since upsampling does not add or substract any detail. That will save a stupid lot of disk space!

The real listening difference between native 16/44.1 and upsampled 24/96 is next to zero. Most of the time when I'm listening to one song I don't really remember what rate is it playing at.

[hugoo]

作者: sgyyz

I do software upsampling because I have a mix of real 24/96 tracks (mostly from HD Tracks) and a lot of 16/44.1 tracks. Since iTunes in Windows does n...

跟我感觉一样，升频之后，区别很小，基本上可以忽略。

[sgyyz]

Hugoo，我从你那儿拿到的Bill Evans Trio - Waltz for Debby (HD Tracks 24/192)，从Audacity看，很多都是在48kHz（mono）cut off。其实就是96kHz stereo。这很明显是从96 upsampled 去192。但file确是192／24的。网站上也注明是192／24的。
https://www.hdtracks.com/index.php?f...00888072330030

Email HD Track and get your refund or any compensation / credit for next purchase.

[hugoo]

作者: sgyyz

Hugoo，我从你那儿拿到的Bill Evans Trio - Waltz for Debby (HD Tracks 24/192)，从Audacity看，很多都是在48kHz（mono）cut off。其实就是96kHz stereo。这很明显是从96 upsampled 去192。但file确是...

谢谢！
给他们发了email，看看会有什么结果。
24/96的要比24/192的便宜$10，虽然24/192的听着效果很不错，但这种明显的cheating怎么样也是不能容忍的。

[sgyyz]

作者: hugoo

谢谢！
给他们发了email，看看会有什么结果。
24/96的要比24/192的便宜$10，虽然24/192的听着效果很不错，但这种明显的cheating怎么样也是不能容忍的。

我也检查了我买的24／96。都还好，只是有一些很明显不能充分利用高频率部分。唯一被upsampled的就是John Coltrane and Jonny Hartman (https://www.hdtracks.com/index.php?f...00011105015721)。今天发现它是从48upsampled去96。但当时买的时候就已经注意到网站写的是24／48。用player打开却是96的。我买时候也就付24／48的价钱，所以没得吵。我认为HD Tracks这个album被人捉痛脚它才重新注明24／48。

[hugoo]

我也在computeraudiophile.com那个帖子里面把图贴了出来，让更多的人看看，这种事情，越多人知道越好。

[sgyyz]

作者: hugoo

我也在computeraudiophile.com那个帖子里面把图贴了出来，让更多的人看看，这种事情，越多人知道越好。

那帖子里已经有人提起跟你一样的遭遇，同样的Bill Evans Trio 24/192。所以我很肯定是upsampling。

[hugoo]

作者: sgyyz

那帖子里已经有人提起跟你一样的遭遇，同样的Bill Evans Trio 24/192。所以我很肯定是upsampling。

这个album的问题好像更严重，我把scale改成48khz，再看看，竟然像是个16/44.1，20k以上全被cut。
edit: 从好的方面想，这16/44.1的效果还真不错，以后连高清都不用买了，录音好的话，44.1就行。